Assortment Planning by Vertical

What assortment planning is

Assortment planning is the decision about which options a brand will carry in a season, channel or location, and how deep each one will be bought, inside the budget the open-to-buy allows. It sits between the line plan, which decides what could exist, and the buy plan, which commits quantities to vendors — the distinction drawn in line planning vs assortment planning. Its output is a breadth and depth plan: how many options, at which price tiers, in which doors and channels, at what quantity each. The decisions behind that plan are the same for apparel, footwear, accessories, home and furniture, outdoor, sporting goods, beauty and wellness, toys and games, baby and juvenile, and jewelry and watch brands. The object the plan is built on is not, and a plan built on the wrong object answers every decision correctly for a different category.

This guide extends what is assortment planning, which sets out the process in the flagship category, across all ten verticals. It belongs to the by-vertical series alongside the merchandise hierarchy, which defines the decision level each category plans at; the planning calendar, which dates the commitment; open-to-buy by vertical, which sets the budget this plan spends; allocation and replenishment, which places what it buys; and markdown and exit strategy, which clears what it over-buys.

The six decisions every assortment makes

Breadth versus depth inside a fixed budget

Breadth versus depth is the first trade: for a fixed receipt budget, more options means fewer units per option. The trade has a floor. Each option has a minimum viable depth — the highest of the size-run floor, the material or fill minimum, the case-pack increment and the vendor minimum order quantity — and below it the option is either unorderable or unsellable. What an option costs works the floor through in detail. Its consequence for the assortment is that breadth is bought in whole floors, not in fractions of depth shaved from the rest of the range.

Option count

The option count is breadth expressed as a number the plan can govern, set per class, per channel and per door tier before individual options are chosen; the total line count formula is the arithmetic. It is the brake that affordability does not provide. Where the marginal option is cheap to order, nothing in the purchase arithmetic stops the count rising, while development, photography, master data and forecast dilution rise with every option added.

Price architecture: good, better, best

Good-better-best divides a class into price tiers that each have a job. The entry tier opens the category at a price the customer does not have to think about, the middle tier carries volume and margin, and the top tier sets the ceiling that makes the middle look reasonable. Each tier needs a difference the customer can see — in material, construction, feature or specification — or the tiers cannibalize one another and the customer trades down to the entry price. Their share of the budget is a mix decision, tracked with category mix percent, rather than something that emerges option by option.

Core versus seasonal

Every category runs two clocks. Core product — carryover styles, evergreen colorways, continuity models, core shades — is planned as a stock position on a replenishment rule. Seasonal product — newness, fashion colors, launches, limited drops — is bought once against a dated window and exited. Putting an item on the wrong clock fails in both directions: a core item bought seasonally stocks out and is exited while its demand continues, and a seasonal item on replenishment keeps ordering into a window that is closing. The strictest form of core, the never-out-of-stock program, has its own section below.

Localization and store clustering

A single national assortment sends every door the average, which over-serves the middle of the range and starves the edges. Store clustering groups doors by demand pattern so that option count, tier mix and depth can differ by cluster without a separate plan for every location — decide at the cluster, execute at the door, as store clustering for apparel and localized assortment planning set out. The clustering attribute changes by category: size profile and climate in apparel, width demand in footwear, showroom format and floor space in furniture, the customer's tone range in beauty, the security a door can provide in jewelry.

Channel assortment: DTC, wholesale and marketplace

Channels carry different assortments because they sell under different constraints. DTC can carry the full breadth, including the edges of a size run or shade ladder, because a site holds the long tail without a fixture. Wholesale carries what each account selects from the line sheet or prebook, so the brand decides which options to offer and at what minimums. A marketplace listing that runs out loses its position while it is out, which favors fewer options held deeper, and it exposes price to every other channel at once. The plan has to decide which options are channel-exclusive, which share one inventory pool, and which channel wins when the pool runs short. Omnichannel assortment planning and the guides for DTC brands and wholesale brands cover each.

The five variables that change by vertical

The six decisions are made everywhere. What they are made on is set by five variables, and the table below fills them in for each category.

The option grain is the object the plan decides, the level at which two items become different decisions. Plan above it and variances have no line to land on; plan below it and noise becomes decisions. What depth physically is determines what one more unit buys: a unit spread across a size curve, a pair in a run, a share of a container's cube, a filled shade, a piece in a safe. How long an option lives decides whether a depth error is corrected next season or carried for years. Minimum viable presentation is the smallest range and quantity that sells in a location; below it the option loses every customer whose size, shade or configuration is missing, which makes the presentation minimum a floor on depth per door rather than a preference. The exit mechanism decides what an over-bought option costs — a markdown, a closeout, a remount, or a return to vendor where the agreement allows one.

Apparel: style-color by size

Apparel builds the assortment on the style-color matrix: styles down one axis, colorways across the other, every cell resolved across a size curve. The option is the style-color, and depth is never one number — it is a quantity distributed across sizes, so an option's floor is set by its thinnest size as much as by the vendor minimum. The season splits into delivery windows with newness over a carryover base, and good-better-best is built from fabric and construction. Breadth creeps through colorways, because a new colorway on an existing style is the cheapest-looking add in the line, and each one arrives at its floor. DTC can carry extended sizes a door cannot hold, as extending a range into extended sizes covers. See apparel brands.

Footwear: model-color by size run and width

Footwear plans the model-color as a run. One option carries a full size run, doubled wherever a second width is offered, so a footwear option has a structurally higher floor than an apparel one, and the assortment is narrower and deeper by construction. Depth is counted in pairs, and the useful measure of a position is complete runs remaining, because a run with its core sizes gone is unsellable while its pair count still looks healthy. Core models carry over on replenishment, fashion colorways rotate by drop, and wholesale depth is sized against prebooks. A second width is a second run, so it earns distribution only in doors whose fit history supports it. Assortment planning for footwear brands covers the size-run arithmetic.

Accessories & bags: style-colorway, evergreen core and hero color

Accessories plan the style-colorway, and handbags and small leather goods have no size axis, so depth concentrates: one colorway absorbs the units apparel would spread across a run. The assortment has two layers — an evergreen core on replenishment, and a seasonal layer in which the hero color goes deep and fashion colorways go shallow, exited with the collection. Once the tannery or hardware minimum is met the marginal colorway is cheap to order, so the option count has to be governed explicitly. Collection families — bag, wallet and cardholder in one leather — set the minimum viable presentation, and attach rate ties breadth to a host category: the belt assortment follows the denim. See planning accessories lines and accessories brands.

Home & furniture: finishes, special orders and container cube

Home and furniture plan the model in a configuration and finish, and the first assortment decision is which finishes and options are stocked and which are special orders, made after the customer commits. Stocked options consume inventory; special orders consume lead time, so moving a finish to special order widens breadth without adding depth. Depth on stocked options rounds to container cube on ocean lead times, and cover is priced at landed cost. Options live across a multi-year lifecycle, with newness introduced at market, so a depth error is carried rather than cleared. The minimum viable presentation is a floor sample plus a way to deliver, and the floor sample is a display asset, not sellable cover. See merchandise planning for home and furniture brands and OTB planning for home goods.

Outdoor: two option grains and the dealer prebook

Outdoor runs soft goods and hard goods in one line, so one assortment holds two option grains: the model-color on a size curve for apparel and footwear, and the model in its specification for gear. Hard goods plan by model year; soft goods refresh by colorway. Dealer breadth is decided at the prebook, so the line offered is wider than the assortment bought, and depth is sized against dealer commitments plus an at-once holdback. Counter-seasonal categories share one budget with different commitment dates, and MAP pricing limits markdown depth, so an over-broad assortment clears slowly. Technical fabric minimums make the colorway a sourcing decision; see planning against fabric minimums and merchandise planning for outdoor brands.

Sporting goods: disciplines, model years and team orders

Sporting goods plan the model within a discipline, and breadth is judged at the discipline: a buyer defends coverage of a sport, not a single model. Each discipline has its own fit axis — grip size, shaft flex, frame size, board length — so depth is distributed per discipline. Equipment runs on model years sold through dealer prebooks, and the carryover-or-closeout decision on the outgoing model belongs to the incoming model's assortment, because both compete for the same dealer floor. Team and roster orders are a separate demand stream, sized by roster and kept out of retail depth, and MAP pushes breadth errors toward closeout and carryover. See merchandise planning for sporting goods brands and planning a model-year changeover.

Beauty & wellness: the shade ladder inside a franchise

Beauty plans the shade within a franchise, and the shade ladder behaves like a size run, not like a color choice: a franchise shipped with gaps at either end of its tone range is incomplete, not edited. Breadth is decided at the franchise and format level, while breadth inside a franchise is close to fixed once the ladder is set. Depth per shade is bounded on both sides: floored by the filling line's minimum run and capped by unopened shelf life, less the remaining life a retailer requires at delivery. Launches are bought to sell down to zero, with core shades on replenishment beneath them; retailer POS by door shows which shades each door tier needs; and testers and gift-with-purchase units consume inventory without producing revenue, so they belong inside the plan. See merchandise planning for health and beauty brands and when dating rules cap your weeks of supply.

Toys & games: case packs, properties and licensed windows

Toys plan the item in its packaging configuration, and the orderable unit is the case or inner pack, so planned depth has to resolve to case multiples at every level or the purchase order rewrites the assortment. Breadth comes from properties, characters and age grades rather than a variant or size axis. Q4 concentration commits the assortment before the selling season can be read, and retailer commitments — the planogram facings each account agrees at its reset — set the wholesale share. Licensed items end on a contract date regardless of sell-through, which makes licensed breadth a timed bet, and safety standards put testing lead time inside the line calendar. See case packs and planned depth, planning a licensed product window and merchandise planning for toy and game brands.

Baby & juvenile: patterns on certified products and registry demand

Juvenile hard goods plan the model in a pattern, and the pattern is a colorway attached to a certified product: adding one can carry its own certification, lead time and lot traceability. Model years follow the certification cycle, and a changeover or a revised safety standard ends an option's life on a date. Registry demand gives the assortment a forward read, and because the registry buyer arrives on their own date, fewer patterns held reliably in stock serve that demand better than wide pattern breadth that stocks out. Recalls operate on production lots, so depth is not fungible across runs. Kidswear is planned as apparel, on size curves. See planning with registry demand and merchandise planning for baby and juvenile brands.

Jewelry & watches: the piece in a metal, placed door by door

Jewelry plans the piece in a metal, because metal moves the cost: the same ring in yellow gold, white gold and silver is three options on three cost bases. Depth per door is one or two pieces, so the assortment decision is almost entirely a breadth and placement decision, and the minimum viable presentation is bounded by what a door can secure and insure. Collections run as continuity punctuated by gifting peaks, so options do not exit on a seasonal date; slow pieces rotate between doors, and memo and consignment let a door carry breadth the brand still owns. Metal cost moves shift the price architecture under the plan, so good-better-best is re-checked against current metal cost, and low velocity makes piece-level inventory the planning grain. See planning margin on a moving cost base and merchandise planning for jewelry and watch brands.

Illustrative example: one breadth and depth plan in two verticals

The figures below are illustrative, chosen because they divide cleanly. They are not benchmarks, not targets, and not drawn from any brand. Both plans follow the same four steps: set the budget in units, set draft depth per option from its share of demand, test every option against its minimum viable depth, and resolve the options that fail.

Plan A is an apparel class of women's knit tops. The receipt budget is 9,600 units across six styles, and each style is forecast at 1,600 units split across four colorways: a core black at 50 percent, two seasonal colorways at 20 percent each, and one fashion colorway at 10 percent. Draft depths are 800, 320, 320 and 160 units. Every option resolves across five sizes on an illustrative curve of XS 10, S 20, M 30, L 25 and XL 15 percent, and the planner's floor is 36 units in any size, so minimum viable depth is 36 ÷ 0.10 = 360 units per option. The two seasonal colorways at 320 and the fashion colorway at 160 all fail.

Apparel can resolve this by cutting breadth. Drop the fashion colorway from each style and — on the line review's explicit judgment that its demand transfers — move its 160 units to the two seasonal colorways at 80 each, which takes them to 400, above the floor. Each style is now 800 + 400 + 400 = 1,600 units, and the class is 6 × 3 = 18 options and 6 × 1,600 = 9,600 units, on budget. A seasonal option resolves by size to 40, 80, 120, 100 and 60 units; the core black to 80, 160, 240, 200 and 120. If the review judges that the fashion colorway's demand would not transfer, the right move is to take its 6 × 160 = 960 units out of the budget, not to spread them. That alone does not clear the floor, because the seasonal colorways stay at 320 against a 360 floor. The review then either funds each one up to 360, adding 12 × 40 = 480 units of depth above forecast demand for a class of 6 × 800 + 12 × 360 = 9,120 units, still inside the 9,600 budget, or cuts each seasonal colorway it will not fund at the floor.

Plan B is a beauty franchise: one foundation in one format. The budget is 6,000 units across a 20-shade ladder. Draft depth follows shade demand — the four lightest shades at 3 percent each, twelve middle shades at 6 percent each, and the four deepest at 4 percent each — giving 180, 360 and 240 units per shade, which sums to 720 + 4,320 + 960 = 6,000. The filling line's minimum is 240 units per shade, so the four lightest shades, at 180, fail.

Beauty cannot resolve this by cutting breadth, because a foundation missing the light end of its ladder excludes every customer in that tone range. The plan instead raises the four lightest shades to the 240-unit minimum, adding 4 × 60 = 240 units, and funds them by taking 20 units from each of the twelve middle shades, which drop to 340. The franchise is still 20 shades and 960 + 4,080 + 960 = 6,000 units.

The two plans started with the same failure and ended in opposite shapes. Apparel bought depth by cutting breadth; beauty kept breadth and moved depth inside the set. The beauty plan also carries two exposures the apparel plan does not. The light end is bought at 240 against demand of 180, which is 60 units of planned surplus per shade and 240 in total, and that surplus has to sell inside a shelf-life window rather than wait for a markdown. The middle shades are bought at 340 against demand of 360, a planned shortfall of 20 per shade that is acceptable only because middle shades are core shades on replenishment and can be refilled. Had they been launch-only shades with no refill, the same shave would have been a stockout the plan chose before the season began.

The never-out-of-stock core and the assortment math

A never-out-of-stock (NOOS) program is the strictest form of core: items the brand commits to keep continuously available, on a replenishment rule, with no seasonal exit. It changes the assortment math in three places.

First, NOOS receipts are reserved before the seasonal plan is built. Replenishment arrives month by month whatever the season decides, so the open-to-buy the seasonal breadth and depth plan spends is what remains after the program's expected receipts. In Plan A, if the six core blacks ran as NOOS, and the program's expected receipts over the same window were the 6 × 800 = 4,800 units the season would have bought, those units would stop being a season commitment and become a replenished position. The seasonal plan would be 12 options and 9,600 − 4,800 = 4,800 units, and every breadth decision would be made against that smaller number.

Second, NOOS items are measured differently. A seasonal option is judged on sell-through inside its window. A NOOS item has no window, so it is judged on in-stock rate at the grain a stockout happens — per size in apparel, per size and width in footwear, per shade in beauty — and on the productivity of the inventory held to deliver it. Replenishment and safety stock set that inventory; the assortment plan decides which items earn it.

Third, NOOS needs a demotion rule, because nothing else ends it. A seasonal option exits on a date, but a NOOS item keeps triggering orders until someone removes it. A program that promotes items every season and demotes none consumes the seasonal budget gradually, and the season's newness gets thinner without anyone deciding to thin it.

Qualification follows the category, because it depends on whether an item can be re-ordered as well as whether it sells: apparel basics when the fabric can be re-run, footwear core models held as complete runs, the accessories evergreen core, stocked home and furniture finishes refilled by the container, beauty core shades within shelf life, outdoor and sporting goods consumables and carryover models until the model year ends, evergreen toys but not licensed ones, baby and juvenile registry staples, and jewelry basics priced at the day's metal cost.

Assortment reviews and hindsight

The assortment is reviewed three times, and each review reads at a different grain. Before the season, the line review tests each proposed option against its floor, its tier and its cluster, and records the cut beside the add; the planning calendar sets the date after which breadth is fixed. In season, the weekly trade meeting reads sell-through and cover by option and cluster and decides chase, reallocation and exit — levers on depth and placement, because breadth is committed by then. After the season, the hindsight writes next season's rules.

The hindsight has to separate three misses that look identical in a class total. A breadth miss is an option that should not have been in the assortment: it sold poorly wherever it was placed, at every depth. A depth miss is the right option at the wrong quantity: it sold out early, or residualized, in every cluster. A placement miss is the right option at the right total depth sent to the wrong doors, channels or curve: it sold out in some clusters and residualized in others. Each writes a different rule — cut the option type, change the depth rule, change the cluster or the curve — and a class-level read writes the depth rule for all three. The record that makes the separation possible is the plan at the grain it was made: the option, its cluster, its tier, its core or seasonal status, and the floor that bound its depth. Hindsight analysis covers the method and decomposing a plan miss the arithmetic.

Failure modes, and the mechanism behind each

The borrowed option grain

A plan built at another category's grain answers every question for the wrong object. Size curves pushed onto handbags create an empty axis and thin every cell. Footwear planned in units rather than runs reports healthy cover while the run is broken. Beauty depth spread from a house-average shade curve over-serves the middle of the ladder and starves the ends in exactly the doors where the ends carry the demand.

Breadth funded by shaved depth

An option added without a compensating cut is paid for by trimming every other option. The trimmed quantities land below the floor, the whole range is under-supported evenly, sizes and shades break early everywhere, and the hindsight reads a broad merchandising miss instead of one funding decision nobody named.

Core and seasonal on one clock

A core item planned seasonally is bought once, stocks out, and is exited while its demand continues. A seasonal item put on replenishment keeps ordering into a closing window, and its residual appears only at the exit date.

One assortment for every door and channel

The national average sends every door the middle of the range. Doors whose customers sit at the edges of the size curve, the shade ladder or the price architecture residualize the options they do not need and stock out of the ones they do, and the class total nets the two into a number that looks close to plan.

Tiers that differ only in price

Good-better-best tiers with no visible difference in material, construction or specification cannibalize each other. The customer trades down to the entry tier, the middle tier residualizes, and the top tier stops doing its job of making the middle look reasonable.

How RetailNorthstar supports assortment planning

RetailNorthstar is AI-assisted planning software that holds assortment planning, line planning, OTB planning, buy planning and allocation on a shared data model — plan, buy, allocate in one connected workflow. For the assortment, that means the breadth and depth plan is built against the open-to-buy it spends rather than reconciled to it afterwards, the options carry through to the buy and to PO and WIP tracking without being re-keyed, and the season's sell-through comes back to the same option-level plan the hindsight has to read. The categories it plans for are set out on the industries we plan for, and the capability is described on assortment planning.

Related resources

• →What Is Assortment Planning in Apparel? — the process in the flagship category
• →Merchandise Hierarchy by Vertical — the decision level each category plans at
• →Open-to-Buy by Vertical — the budget the breadth and depth plan spends
• →Allocation and Replenishment by Vertical — placing what the assortment bought
• →Markdown and Exit Strategy by Vertical — clearing what it over-bought
• →What an Option Costs — minimum viable depth and the costs that do not scale
• →Never Out of Stock (NOOS) — the core program the seasonal plan is built around
• →Return to Vendor (RTV) — the exit that runs back up the supply chain